This is a good little article about it.
Tom Hanks' Greyhound Is a Quietly Thrilling War Drama That's Not Just for Dads
https://time.com/5865255/greyhound-review-tom-hanks/
The trailer didn’t do it justice. I really enjoyed it. I thought it had a great balance of realistic/technical aspects vs the story and emotional sentiments—One element didn’t overpower another. The CGI was a lot better than I was anticipating too.
I like Hanks. He’s good at portraying strong and knowledgeable, yet humble characters who aren’t void of humanity and values, regardless of what’s at stake.
(I found myself thinking about what would be worse—being in a freezing/frozen snow covered trench, or standing on a frozen ice-covered deck with freezing water being splashed in one’s face. The Army and Navy folk will have to weigh in. I haven’t experienced either, and neither one seems appealing. Go Airforce

)